#include <fstream>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int n,a,b;
    int i;
    fin>>n;
    for (i=1;i<=n;++i)
    {
        fin>>a>>b;
        int r;
        while (b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<'\n';
    }
    return 0;
}